I've hated elemental for a long time. Simplicity isn't something I particularly like. The ease of keep flame shock up, and spam lightning bolt until lava burst comes off cool down, is as far as i know, the easiest rotation in the game. Enhancement is far more complicated and its great to preform your rotation well, to get applause from simply being your spec.
However pvp doesn't reward complicated. Trying to maintain a decent rotation while improv-ing based on posititioning is AWFUL. So I went with elemental, and I like the simplicity. It's very cat and mouse. If someone closes in, you create gaps, and get back to range. Charge? TS. Intercept? Root with earthbind. Hamstringed and they trinket out of earthbind? Frost shock and wolf away.
I love that kind of thinking. Enhancement isn't conducive to my style of thinking in that respect (although I'm having a hell of time staffing warriors to death by accident on occasion. Imagine how it makes them feel)
Also just as a note, I do not dislike warriors by any measure. I just seem to have a lot that pick on me.
However its very difficult to get pvp gear. As of now I've only got a necklace, a cloak and a totem. The totem is neglible from any elemental totem, thankfully the necklace and cloak DO make a sizable difference as I already don't die from a rogue deciding to hit me till i die.
Oh and this goes without saying, but a PVP spec helps SOOOOOOO much. :P